Stapling machine



March 26, 1940. c ss I 2,195,284-

STAPLIlfIG MACHINE Filed Feb. 9, 19 39 inventor.- Gewye 631 6553616Patented Mar. 26, 1940 I U D sures STAPLINGMAOHINE George C. Passek,Philadelphia, Pa., assignor to Q Alfred J. Paynter, Philadelphia, Pa.

Application February 9, 1939, Serial no. 255,42a

'3 Claims. (01. 1-49 M This invention relates to improvements instapling machines of the type which includes a guide fora row ofstaples, a staple passage for receiving staples successivelyfrom'theguide, a driver for driving the staples through the passage and into thework to be stapled, afollower for feeding the staples along the guideand a spring actuated follower for urging the staples forwardly alongthe guide'and feeding them into the staple passage. 1

The object of the invention is to improve the mechanism for actuatingthe follower, whereby a more'uniform pressure of thefollower against thethe mechanism as. will be hereinafter described I and claimed. I

In the accompanying drawing, illustrating the 5' invention;

Figure Us a longitudinal, vertical section of my improved staplingmachine.

'- Figure 2' is a transverse, vertical section I through a part-of themachine, on line 2+2 of Fig. 1, enlarged. 1,. I

' Figure-3is a sectional. detail, on line 3 -3 of Fig. 2, showing-a partof the staple feeding mech- Figure 4" is a sectional view similar toFig. 3,

33 showingt-afmodification of the staple feeding inechanismj Referringto the 'drawing, 4 designates the machine frame having ahorizontally-extending lower" portion 5 and a vertically extending for-.an wardportion 6 rising from the forward end of the lower portion;

The lower portion? of the frame is hollow and hasa' floor plate Isecured thereto and provicled with a hollow, longitudinally extendingstaple 45 guide ,8 forreceivingand guiding a row of stasure ofthefollower H! presses-the foremost staple i i of the row of staplesagainst a plate 12 which is pies 9. I e

1 The row of staples 9 is fed forwardly by a follower which embraces thestaple guide 8 and is slidable thereon and is urged forwardly by meanspresently. 'described. The forward pressecured to the forward portionofthe machine frame ,and provides thefront .wall of the verti- 5 callyextending staple passage [3 whose rear wall 1 is formed by theforward'end of thestaple guide 8. The parts forming-the passage it areof usual construction. v 4 V Slidably fitted within the'forward portion6 of the frame 4, above and'invalinement with the foremost staple"l'l,isa'staple driving plate l4 constructed and arranged to. be moveddownwardly from its normallyelevated position shown in Fig-'1 andthrough the staple passage [3 to drive the said foremost staple 'lldownwardly through the passage I3 and into the work being stapled, andto thereby discharge the staple through the open lower-end of thepassage. v

The staple driver l4 has a bracket [5 secured thereto and pivotallyconnected to the lower end of a link lfi'whoseupper end is pivoted-on apin I! carried byfalever arm l8 whichis fulcrumed on a pin l'9iritheforwar'd' portion'fiof the ma-' chine frame. The link lfi andthefulcrumed end portion of the lever arm [8 are housed within themachine frame, and'the free'end portion'of the lever arm extends outthr'ough 'a slot 20 in the frame andformsa'handle 21 which may belowered and raised to effect staple driving operations.

The 'staple driver l4 and its operating lever arm l8 are maintainedhormallyelevated by a'spring 22 which is coiled around the fulcrum pinl9 and has one end'thereof'engaged with the pivot pin I! and the otherendthe'reof engaged with a transverse pin 23 fixed in' th'e machineframe. The lever arm I8 is moved against the action of the spring 22when the arm H3 is lowered to effect a staple driving operation,-and,thereafter, the spring acts to elevate the armitofits normal position'.

The follower is provided with a part 24- which' extends upw'ardlytherefrom and'into a longitudinal s1ot25 in the lower portion 5 of themachine frame; and which is secured to one end portion of a windableelement -26 which may be a cord or cable of any suitable material andconstruction; Theother end portion" of the element 26 is secured to thecentral cylindrical portion 21 of a rotatable member 28. This member 28comprises a shaft portion 29 having its ends rotatably mounted intheside walls of the machine frame, and the cylindrical portion 21 whichmay be secured upon the shaft portion 29 or. formed integrallytherewith.

The cylindrical portion 21 of the member 28 is provided with annular endflanges 3D, 30 between which the cable or element 26 is'arranged to bewound upon or unwound from the cylindrical portion of the member.

moved in the reverse direction or rearwardly.

The pulley 3| rotates freely on a shaft 36 which is mounted in themachine frame.

Arrangedon the respective sides of the cylindrical portion 21 of themember 28 and surrounding the shaft portion 29 thereof between the sidewalls of the machine frame and the flanges 30, 30 are two windablespiral springs 32, 32 having the inner ends thereof secured to the shaftportion 29 and the outer ends thereof secured or attached to atransverse pin 33 fixed in the machine frame.

The springs 32, 32 and the element 26 are constructed and arranged to bewound upon and unwound from. the shaft portion 29 and the cylindricalportion 21 of the rotatable member 28, respectively, inreversedirections, so that when the follower Ill is manually moved rearwardly,the rotatable member 28 will be turned in the direction of. the arrows34 in Figs. 1 and 3, by the unwinding of theelement 2G to wind thesprings 32, 32 upon the shaft portion 29; and, thereafter, when thefollower I is released against the rearward end of a row of staples uponthe staple guide 8, the springs 32, 32, in tending to resume theirunwound'conditi-on, will turn the member 28 in the direction of thearrows 35 in Figs. 1 and 3, and wind the element 26 upon the member 28,and thereby urge the follower ID and the row of staples 9 engagedthereby forwardly. I

The cylindrical portion 21 of the rotatable member 28is oflargerdiameter than the shaft portion 29 thereof to enlarge the extentof the foreward movement of the follower ID with relation to theunwinding action'of the springs 32, 32 in feeding the staples forwardly,and to increase the power of the pull of the element 26, when thefollower Ill is manually moved rearwardly and the springs 32, 32aretherebywound around the shaft portion 29 of the rotatable member 28.

' I have discovered that the. construction and arrangement of theseveral. elements and parts thereof of the devices for urging thestaples forwardly along the staple guide 8, provides a mechanism inwhichthe staples are urged forwardly by a more uniform pressurethroughout the length of the travelof the follower, than has beenheretofore employed, that the springs act with greater efliciency inperforming their staple feeding function, and that the springs may bewound with less manual effort when the follower H1 is moved rearwardlyto be re-engaged with a row of staples, following successive staplefeeding operations.

In the-modification illustrated in Fig. 4', the springs 32 are woundaround the rotatable member '29 reversely of the direction in which theyare shown in Figs. 1 and 3, and the element 26' is wound around themember 29 reversely of the direction in which it is shown in Figs. 1 and3'. This arrangement of the parts permits the idler pulley 3.! to bedispensed with, and permits the cable or element 26 to extend directlybetween the rotatable member 29 and the follower l0.

I claim:

1. In a stapling machine, the combination of a frame having a guide forreceiving and guiding a row of staples, said frame having stapledirecting parts providing a passage for receiving and directing staplesfrom said guide, a staple driver operable to drive staples through saidpassage, a

, follower movable along said guide for advancing a row of staplesthereon and positioning them successively in said passage, a memberrotatably mounted in the frame and. having a shaft portion and acylindrical portion of different diameter than the shaft portion, a,windable spring having one end attachedto said shaft portion and itsother end attached to said. frame and constructed to be wound aroundsaid shaft portion when the member is turned in one direction and toturn said member in'the reverse direction by the unwinding action of thespring, and a windable element having one end attached to saidcylindrical portion and: its other end attached to said follower andconstructed to be wound around the: cylindrical portion of said memberandrthereby move 'said follower forwardly toward said passage when themember is turned in said reverse direction and to turn said member inthe first named direction by the unwindingof said element when the;follower is moved rearwardly from said. passage, saidshaft portion beinglaterally adjacent to said cylindrical portion, and saidspring and saidelement being windable around said shaft portion and said cylindricalportion, respectively, in side by side relationship.

2. In a stapling machine, the combination of a frame having a guide forreceiving and guiding a row of staples, said frame having stapledirecting parts providing apassage for receiving and directing staplesfrom said guide, a staple driver operable to drive staples through saidpassage, a follower movable along said guide for advancing a row ofstaples thereon and positioning them successively in said passage, arotatable member having a shaft portion rotatably mounted in the frameand carrying a central cylindrical portion having annular flanges at theends thereof, two windable springs located onthe respective sides ofsaid cylindrical portion, each of said springs having one end attachedto the shaft portion of said member and its other end attached to saidframe and constructed to be wound around the shaft portion when themember is turned in one direction and to turn the member in the reversedirection by the unwinding action of the spring, and a windable elementhaving one end attached to the said cylindrical portion of said memberand its other end attached to said follower and constructed to be woundaround said cylindrical portion between the end flanges thereof andthereby move said follower forwardly toward said passage when the memberis turned in said reverse direction and to turn said member in the firstnamed direction by the unwinding of said element when the follower ismoved rearwardly from said passage.

.3. In a stapling machine, the combination of a frame having a guide forreceivingv and guiding a row of staples, said frame having stapledirecting parts providing a passage for receiving and directing staplesfrom said guide, a staple driver operable to drive staples throughsaidpassage, a follower movable along said guide for advancing a row ofstaples thereon and positioning them successively in said passage, arotatable member comprising a shaft portion rotatably mounted in theframe and carrying a central cylindrical portion of larger diameter thanthe shaft portion and having annular flanges at the ends thereof, twowindable springs located on the respective sides of said cylindricalportion, each of said. springs having one end attached to the shaftportion of said member and its other end attached to said frame andconstructed to be wound around the shaft portion when the member isturned in one direction and to turnthe portion of said member and itsother end attached to said follower and constructed to be wound aroundsaid cylindrical portion between the end flanges thereo-f and therebymove said follower forwardly toward said passage when the member isturned in said reverse direction and to is moved rearwardly from saidpassage.

GEORGE C. PASSEK. H

turn said member in'the first named direction by g the unwinding of saidelement when the follower

